Background:
I am developing a load cell sensor which will detect weight and send it to Server application.Project is related to IoT. This sensor should be connected to internet in order to send data to server. The sensor has wi-fi module which will take care of this communication.
What I want to achieve :
User should be able to set his own wi-fi username/password in the sensor device. for this, I am thinking of android app which can connect to sensor and send username/password to it. But I am not aware of standard procedures.
Question:
Can anyone tell me how do we ensure that end user can easily setup his own sensor by passing required data to it ? what is the standard procedure to achieve this ?
You can use a NFC/BLE as suggested and/or put the device into AP mode serving a configure webpage as default. A computer, android, any device can connect to this AP and configure the sensor. Chromecast do something similar to this. It broadcasts so Android device can detect it, than it follows a Android app flow that should configure it to the WiFi desired and finally, it can be found at local WiFi.
Seems the best approach to me.
Related
I want to detect and send/recieve data from a smartphone in some vicinity without using internet.
I've always thought it would be fun to do this with audio. Most modern ways of modulating a signal (like OFDM) will sound like a white noise hiss over audio, and you should be able to get a few KB/s in a normal room environment if the phones are close to each other.
It also has the benefit that the user can always tell when it's transmitting.
Multiple methods are possible.
You could use a private (isolated) local area network that is not connected to the internet. Either ethernet cabled or over WiFi.
Airdrop might not require an internet connection (a WAN connected access point).
Bluetooth BLE communication doesn't require an internet connection. You could use an ESP32 or Raspberry Pi to read sensor data and have a mobile device connect over BLE to the ESP32 or Pi (or another mobile device).
You could use audio. Play FSK tones or Morse Code on one device and receive and decode the audio modulations on another device. (I've tried both of these methods successfully.) Or you could use a speech synthesizer on one device and a voice transcription app on another.
You could use light. Flash the flashlight (or LED) on one device, and receive and decode the light pulse sequences using the video camera another device. (There may be apps in the App store that can do this.) Or display a bar code or QR code on one device and use the camera on another to decode the data in the bar code or QR code.
You could use MIDI. Bluetooth MIDI over BLE from device to device. Or with MIDI cables, using a bunch of Lightning to USB and USB to Midi adapters.
You might be able to use vibrations from the Taptic engine on one device, and detect the vibration sequences using the motion sensor API on another device.
With many Android devices, you can connect a USB to serial port dongle, and use a long RS232 serial cable between devices.
With an iPhone, you could use a Lightning to Ethernet adapter, plus a fiber optic media converter, and send signals over several kilometers of (private) fiber optic cabling. etc.
You might want to use the IR sensor on your phone by using an IR sensor library. (Search it on a search engine). If the does not have that, you can use a QR code generator library (Search it on a search engine) to transfer your data.
You could use a raspberry pi (for example) to take readings from your sensor and store them. Make it run a webserver and create its own wifi network (not connected to the www) where you can access a webpage that displays the readings. Or you can set it up so that the Pi logs into the wifi hotspot from your phone whenever available and then uploads the data or sends it in an email or whatever.
You can use an internet module, for example the FONA 800 or 808 by Adafruit to let your Pi talk with the internet, via a SIM card from hologram.io for example. The Pi can talk to the FONA in Python. But to be honest that doens't really answer your question with the proximity thing - but if I were you I would drop that and do the following:
Read the data from the sensor and save it to a csv file on the Pi
Once every hour (or whatever), connect to the internet via FONA/hologram.io SIM
Insert the data from the previous hour to a remote mysql database
Use PHP or something to display the data from the database nicely and access via your phone
That way, you can have as many sensors as you want and access all from your phone. As I said the proximity thing is not relevant for me, it's easier imho to go through cellular (+ I wouldnt know how to do it over lets say bluetooth)
I want to send data from 4-7 iPads to a MacBook and back for an application I plan on making that uses all devices and I want to avoid using a server for exchanging data. Also I would like to avoid connecting the devices over a local wifi network, as I would like my application to work regardless of wifi availability.
Is there a way of doing this using Bluetooth or a wired solution? Or maybe something else?
I think your best way is using apple Multipeer Connectivity, you can connect up to 7 nearby devices via Bluetooth, Wifi, or creat a local Wifi: https://developer.apple.com/reference/multipeerconnectivity
I did a lot of brain-storming about this, and couldn't reach a solution.
I am posting this as i can get some ideas.
I have developed a WiFi-IoT based device with sensor, which shows up in AP mode. A mobile phone connects to this AP and then the device starts sending sensor data to the mobile phone. A mobile application plots and displays this data.
Now, i want to send this data from mobile to internet. Connecting my mobile to another AP with internet is not an option, as i don't want to break the continuous data transmission.
Using internet of data provider is one option, but that brings constraint of have mobile data.
What other options do i have to send my data from mobile to internet ??
Edit:-
I worked on the suggestions, and came to this point:-
1) WiFi-IoT device (in station mode) and mobile phone connect to same Internet-enabled WiFi access point. WiFi-IoT device has the IP address of the mobile phone for current network, and sends data to a TCP port (eg. 9801) of this IP address. The application in mobile phone reads the data from the port no. 9801 and stores it and hosts it on the internet.
This works fine.
2)WiFi-IoT device comes up in Access Point mode, and the mobile phone connects to this Access Point. Now there is one-to-one connection between WiFi-IoT device and mobile phone.
My question is, in the second scenario, without breaking this one-to-one connection, is there way to host data to internet:-
1) without using mobile internet provided by mobile data service provider ?
2) without using a second mobile phone ?
I may be wrong, but i am just asking this to make be sure whether my requirement can be achieved or not !!
I don't think you can connect to two APs at the same time.
Maybe use Bluetooth as device to phone link?
Or have the device connect directly to internet after some config done in AP mode and then send a copy of the data to your phone app (either via WAN or locally to the private IP your phone gets from the Internet gateway AP)?
--Edit--
Let me explain about the second one:
What I mean is basically have your IoT device directly connect to Internet and send data to a server (your phone has also to be connected to Internet). Then make the server send a data copy back to your phone. It's two step process: 1) while the IoT device is in AP mode, use your phone to login and configure which Internet-connected AP it should be connected to. This serves as UI for your IoT device. 2) start sending data.
Or a bit ugly, just let the IoT device talk to your phone in the same WiFi network via private IP.
I brought up this way because you mentioned anyway your device has to send data to Internet(I assume it's a server) and have phone talk to a known location server is more portable and scalable once you have more than one IoT device.
--Further Edit--
I don't think there is a way to do what you described. At least from my experience:
1) on the link layer, the wireless NIC has to be able to connect to two APs at the same time. This is not a feature currently available.
2) on the network layer, there has to be two IP address attached to the same NIC, which I don't think is available in current OS for wireless NICs. Though there is a way to do this for Ethernet card, I.e. via Aliasing.
I am just bit curious. I am new in IoT and currently started working on it using ESP8266 device. I know that it needs some firmware to write and install, like smart.js.
But I have read, Jasper (http://www.jasper.com/) can connect any device and manager, monitor etc. So I am bit curious how it works internally. I am not sure whether it installs firmware created by Jasper or in other way. I was reading this article: http://www2.cumulocity.com/guides/users-guide/jasper/#link-sims
Anyone knows about this? I mean how Jasper works to connect to any devices?
Cisco bought Jasper, which is useful for IoT business. However it might be better way for you to check Interactor(www.interactor.com) which is great for IoT development. Interactor works to conntect to any device with any protocol.
Cisco Jasper should not be confused with device management libraries (whether they be server based, or device based or both).
Jasper is a telecom based service that allows you to see and manage the connection state of sim inserted in the device. Regardless of the state of a device, the modem and sim (provided they are powered) will connect to the telco and provide basic information about the connection.
Think of it as a network tool (server originated) for the gateway on the device, not the device itself. It allows you to force disconnect devices from the network, ban sims from the account so a stolen or runaway sim can eat through data, basic connectivity tests (is the modem powered, does the sim have permission to transmit data over the network, etc).
The main value of jasper is that it allows you to manage you data costs by applying the appropriate rate plan to each device, and disconnect devices that are using too much (for whatever reason).
Jasper does not cost anything to use, however telcos will apply a rev commit (min monthly spend) usually $500/month to gain access. the sims are the same as PCS (phone) sims, but they are on their own network internally, and are specific to that telcos jasper. i.e. you can't take 500 devices using PCS sims, and import those sims into jasper. you'd need to do a physical swap of the sims.
I am currently trying to develop an application that uses the device camera to record video. Currently i am using an Apple demo that gets the data incoming from the camera and display it in a layer. In a second phase i started documenting about how to transfer that data via Bluetooth and/or Wifi to an other iPhone (real time local streaming), but i am getting no information about whether this is possible or not. Some posts say that this is limited due to the limited maximum data transfer size over wifi or Bluetooth. Could anyone tell me if this is possible or not ? Could anyone give me an example ? Thanks.
Sure you can at least for WiFi. With Bluetooth there may be some issue with bandwidth. For network library, there is this excellent library with example that you can start with. You will need to learn at your own pace. Good luck!